York YK-EP Operation And Maintenance Manual page 77

Table 65: Display only
Field/LED name
Output Current – Phase A, B,
C
Pre-Rotation Vanes Control
Mode
[Pre-Rotation Vanes] Open
(LED)
[Pre-Rotation Vanes] Close
(LED)
Table 66: Programmable
Button Access level
Set Service
Auto Service
Fixed Service
Raise Service
Lower Service
Manual
Service
Increment
[Pre-Rotation
Service
Vanes] Open
[Pre-Rotation
Service
Vanes] Close
[Pre-Rotation
Service
Vanes] Hold
[Pre-Rotation
Service
Vanes] Auto
YK-EP Style B Centrifugal Chiller
Description
Displays the phase current measured to the motor.
Indicates whether the vanes are under manual or automatic control.
Illuminates when an OPEN command is being sent to the vanes.
Illuminates when a CLOSE command is being sent to the vanes.
Description
Allows manual programming of the Command Frequency value.
Manually programming this value will put the drive frequency
control in Manual Speed Control mode and send the programmed
Command Frequency to the drive.
Puts the drive frequency control in automatic control. The Pre-
Rotation Vanes calibration must have been successfully performed
before this entry will be accepted.
Puts the drive frequency control in fixed speed mode, commanding
it to run at maximum frequency (50 or 60 Hz).
Puts the drive frequency control into manual mode. Each time it is
pressed it increases the Command Frequency to the drive by the
amount defined by the MANUAL INCREMENT key. It will not raise
the value above the maximum allowed (50 or 60 Hz).
Puts the drive frequency control into manual mode. Each time it
is pressed it lowers the Command Frequency to the drive by the
amount defined by the MANUAL INCREMENT key. It will not lower
the value below the minimum allowed; (30Hz for 60Hz units; 25Hz
for 50Hz units).
Defines the amount by which the manual Raise and Lower
commands will change the Command Frequency to the drive in
Manual Speed Control mode.
Puts the vane control into manual mode and sends an OPEN
command to the vanes.
Puts the vanes control into manual mode and sends a CLOSE
command to the vanes.
Puts the vane control into manual control and sends a HOLD
command to the vanes.
Puts the vane control into automatic mode.
77